ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is 1, 1-Dimethyl-3-butene 1,1,1-Trimethyl-3-propene 3,3,-Dimenthyl-1-butene 3,3,3,-Trimethyl-1-propene
2 Which of the following substances is used as an antiknock compound? Tetraethyl lead Lead tetrachloride Lead acetate Ethyle acetate
3 The order of reactivity of halogens in aliphatic substitution reactions is Br2 > C12 > F2 C12 > Br2 > F2 C12 C12 > Br2 F2 > Br2 > C12
4 Acetylene gives White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2 White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12 White ppt. with both Red ppt. with both
5 The compounds which have any atom other than Carbon atom, in rings are called as Monocyclic Heterocyclic Homocyclic None of the above
6 The open chain organic compounds are called Linear compounds Aromatic Aliphatic Both A and B
7 Normal by product of cracking is Ethane Butane Benzene All of them
8 In alkynes the bonds between carbon atoms are All sigma bonds All pi(<i style="box-sizing: border-box; color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 19.8px;">π</i>) bonds One is sigma and two are<i style="box-sizing: border-box; color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 19.8px;">π</i>(pi) bonds One is<i style="box-sizing: border-box; color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 19.8px;">π</i>(pi) and two are sigma bonds
9 The general formula for alkenes is C<sub>n</sub>H<sub>2n+1</sub> C<sub>n</sub>H<sub>2n+2</sub> C<sub>n</sub>H<sub>2n</sub> C<sub>n</sub>H<sub>2n-2</sub>
10 In sp2type hybridization the three equivalent sp2orbitals lie in the same plane and at angle of 0<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 180<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
11 Sp3 hybridization occurs when carbon is bound to Four other atoms Three other atoms Two other atoms One other atoms
12 Hydrocarbons contain C and S only C and H only C, H, and O only C, H, O and N only
13 Unsaturated hydrocarbon containing a double bond are called paraffin Alkanes Olefins Acetylene
14 The characteristic reactions of alkanes are Addition reactions Substitution reactions Condensation reactions Polymerization reactions
15 Which of the following compounds contains a triple bond? Alkane Alkene Alkyne Benzene
16 Which of the following gases is used for illuminating purpose? Methane Ethane Propane Butane
17 The next homologue of C10H22will be C<sub>9</sub>H<sub>20</sub> C<sub>12</sub>H<sub>26</sub> C<sub>11</sub>H<sub>24</sub> C<sub>13</sub>H<sub>28</sub>
18 Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called, Saturated Un-saturated Magnetic Para-magnetic
19 Identify the compound which has a bond angle of 109.5° Ethyne Ethere Methane Benzene
20 The active part in a molecule is called Homologous series Functional group Chemical bonding Ionic complex
21 When a compound X is passed through a dilute alkaline solution of KMnO4the pink colour of solution is discharged. The compound X is possbibly Methane Ethane Ethene Benzene
22 Which of the following contains single bonds Benzene Alkyne Alkene Alkane
23 The process in which one s and two p orbitals mix up with each other is called Sp-hybridization Sp<sup>2</sup>-hybridization Sp<sup>3</sup>-hybridization Dsp<sup>2</sup>-hybridization
24 The process in which orbitals of different energies and shapes mix up with each other to give equivalent is called, Hybridization Polymerization Isomerisation Carbonization
25 The structure of benzene is Hexagonal Pyramidal Square planer Tetrahedral
26 Which is a mixture of low boiling hydrocarbon Natural gas Petroleum Wood Graphite
27 Which of the following is complex? CaSO<sub>4</sub>. 0.5H<sub>2</sub>O (C<sub>6</sub>H<sub>10</sub>O<sub>5</sub>)<sub>n</sub> C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> CH<sub>4</sub>
28 Polythene is a polymer of Ethane Ethene Acetone Propylene
29 Acetylene had a characteristic ethereal smell resembling that of Ginger Vinegar Garlic Onion
30 Replacement of hydrogen atom by - SO3H group in benzene is called Nitration Alkylation Sulphonation Acylation
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